Rotary tool.



No. 69|,596. Patented 1an. 2|, 1902.

F. n. CHAMBERS.

ROTARY. TOOL.

(Application led Ont. 9, 1901.) (No Model.)

' if Il rrnn STATES.A

PATENT Orrrcn.

FRED D. CHAMBERS., OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OFONE-FOURTH TO FRANK E. BEATTY, OF WASHINGTON, DISTRICT OF COLUMBIA.

ROTARY TOOL.

SPECIFICATION forming part of Letters Patent No. 691,596, dated January21, 1902.

Application tiled October 9, 1901. Serial No. 78,113. (N0 mOdei-J To allwhom t may concern: n

Be it known that I, FRED D. CHAMBERS, a citizen of the UnitedStates,residin g at Washington, in the District of Columbia, haveinvented certain new and useful Improvements in Rotary Tools, of whichthefollowing is a description, reference being had to the accompanyingdrawings and to the figures of reference marked thereon.

My invention relates to rotary cutting-tools, such as those used formilling, boring, drilling, cutting, burnishing, and the like.

It is the object of my invention to provide simple and efficient meansby which such tools may be detachably secured to the arbors by whichthey are carried; and with this object in view my invention consists inthe tool hereinafter described and claimed and the means described andclaimed by which it is secured to its arbor.

In the drawings, Figure 1` is a longitudinal view, partly in elevationand partly in section, showing the tool secured to the arbor. Fig. 2 isa horizontal sectional View taken on line 2 2 of Fig. 1. Fig. 3 is adetail View. Fig. 4 is a longitudinal view similar to Fig. 1, butshowing a modification. Fig. 5 is a top plan view of the tool shown inFig. 4, and Fig. 6 is a detail view.

In the milling-machines commonly used the milling tool or head issecured to its arbor `by screw-threading it onto the arbor. Theresistance of the work causes the tool to be driven onto the arbor sofirmly that it is a matter of great difficulty to unscrew it and oftenit cannot be unscrewed without injury to the tool I have in anapplication for Letters Patent filedon the 19th of June, 1901, SerialNo. 65,183, shown a construction in which this difficulty is obviated aswell as other difficulties found to arise Where milling tools or headsare secured to their arbors by screw-threads or where they are held fromrotation on their arbors by keys.

The present invention is an improvement upon the invention of myapplication referred to.

Describing my invention in detail, 1 is the arbor or spindle by whichthe milling or other 5o tool is carried and by which it is rotated.

i This arbor or spindle has at its end a noncircular portion 2, as inthe invention of my application above referred to. This non-cylindricalportion is preferablyT polygonal in cross-section. I have shown ithexagonal in cross-section, as it should be in cross-section either ahexagon or some regular polygon in which the angles between adjacentsides are greater than a right angle for reasons which .willbe'hereinafter explained.

Above the non-circular portion 2v the arbor is circular incross-section, as shown at 3, and

of greater diameter than the diameter of the non-circular portion. Thisportion 3 may be tapered, as shown in Fig. 1, or cylindrical, as `shownin Fig. 4. Above this portion of the arbor and of greater diameter thanthe portion 3 is a screw-threaded portion 4.

On the portion 3 of the arbor is fitted a sleeve 5, which is showntapered in Fig. 1 to fit the tapered portion 3, as there shown, and isshown cylindrical in Fig. 4 to fit the cylindrical portion 3, as thereshown. This sleeve 5 is provided with an outwardly-turned flange 6 atits upper end and an interrupted flange 7 at its lower end, which may beoutwardly turned, as shown in Figs. 1, 2, and 3, or n'- wardly turned,as shown in Figs. 4 and 6. Whether outwardly turned or inwardly turnedit is cnt away at intervals, the cutaway portions preferably equal inlength to the portions which remain. The outwardlyturned flange 6 at theupper end of the sleeve 5 is engaged by an inwardly-turned flange 8 atthe lower end of a sleeve 9, which is interiorly screw-threaded to fitthe screw-threaded portion 4 ofthe arbor. This sleeve 9 is pret'- erablyprovided with means, such as notches 10, by which it may be engaged by aSpanner'.

In the form shown in Figs. 1, 2, and 3th@ lower end ofthe sleeve 5 isadapted to engage an inwardly-turned flange 11 on the tool 12, theflange 1l being out away, as shown,'to

permit the portions of the iiange 7 to enter' IOO struction shown inFigs. l, 2, and 3 the tool v is first slipped upon the non-cylindricalportion of the arbor. The sleeve is then brought down,and the portionsof its flange 7 which are not cut away enter between the portions of theflange ll, and by turning the sleeve 5 these portions of the flange 7engage beneath the portions of the flange ll. A lug I3 on the sleeve 7is arranged to engage the end ot' one of the portions of the flange iland prevent its being rotated beyond the point at which the portions of'the flanges 7 and ll are in full engagement. The tool being thusengaged, the sleeve 9 is rotated to draw the sleeve 5 upward upon thetapered portion 3 and to hold the tool firmly upon the arbor. In orderto release the tool, a slight backward turn of the sleeve 9 permits thesleeve 5 to be turned to release its flange 7 from engagement with theflange ll of the tool.

In forming the flange ll of the tool I preferably avoid all right anglesby rounding the ends of the cut-away portions and rounding the recessbelow the flange, as shown. By thus avoiding angles the liability ofinjury to the tool in tempering is avoided.

In the construction shown in Figs. el, 5, and 6 I have shown the sleeve5 provided with inwardlyturned flange 7 and the tool l2 is shown withoutwardly-turned flange ll. This necessitates providing the tool with amore or less extensive shank. The operation of securing the tool to thearbor in this form of my invention is substantially the same as 3 abovedescrib'ed. In these figures of the g drawings I have also shown theportion 3 of the arbor and the sleeve 5 as cylindrical instead oftapering, as in Fig. l. it will be understood that the tapered form maybe used with sleeves having inturned lower flanges to fit tools havingShanks, as shown in Figs. 4 and 5, and that the cylindrical form may beused with sleeves having outwardly-turned lower flanges, as shown inFigs 2 and 3. In fact, it is desirable and I contemplate providing eacharbor, Whether tapered or cylindrical, with two sleeves, one withinturned lower flange and the other with outwardlyturned lower flange,and to use either of them as may be required, the two beinginterchangeable and the same upper sleeve 9 being used with both.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. Arotarytoohhavinga central bore adapted to fit the non-circular endof an arbor and provided with an interrupted flange in comj; binationwith an arbor, a sleeve carried by l the arbor, having at its lower endan interi rupted flange adapted to engage the flange of the tool andmeans for securing the sleeve to the arbor; substantially as described.

1:2. A rotary tool,having a central bore adapted to t the non-circularend of an arbor and provided with an interrupted flange in combinationwith an arbor formed in the rear face of the tool, a sleeve carried bythe arbor having at its lower end an outwardly-turned interrupted flangeadapted to engage the flange of the tool and means for securing thesleeve to the arbor; substantially as described.

3. A rotary tool havinga central bore adapted to tit the non-circularend of an arbor and provided with an interrupted flange, in combinationwith an arbor, a sleeve carried by the arbor having at its lower end aninterrupted flange adapted to engage the flange of the tool, a stopcarried by the sleeve and means for securing the sleeve to the arbor;

substantially as described.

l. A rotary tool having a central bore adapted to fit the non-circularend of an arbor and provided with an interrupted flange, in coinbinationwith an arbor having a tapered portion above its non-circular end, atapered sleeve carried by the arbor having at its lower end aninterrupted flange adapted to engage the flange ot" the tool, and meansfor securing the sleeve to the arbor; substantially as described.

`5. A rotary tool havingacentral bore adapted to fit the non-circularend of an arbor, and provided with an interrupted flange in coinbinationwith an arbor, a sleeve carried by the arbor having at its lower end aninterrupted flange adapted to engage the flange of the tool and having aflange at its upper end, of a second sleeve having a flange adapted toengage the upper flange of the first sleeve and engaging screw-threadsVon the arbor; substantially as described.

i5. A rotary tool having acentral bore adapted to llt the non-circularend of an arbor, and provided with an interrupted flange, in combinationwith an arbor having a tapered portion above the non-circular end, atapered sleeve carried by the arbor, having at its lower end aninterrupted flange adapted to engage the flange of the tool and having aflange at its upper end, of a second sleeve having a flange adapted toengage the upper flange of the first sleeve and engaging screw-threadson the arbor; substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

FRED D. CHAMBERS.

Witnesses:

A. P. GREELEY, iGRAFTON L. MoGiLL.

IOO

